CN105980073B

CN105980073B - Roller leveler and method for producing elongated linear member

Info

Publication number: CN105980073B
Application number: CN201580006409.7A
Authority: CN
Inventors: 托马斯·弗罗伯泽
Original assignee: Sandvik Materials Technology Deutschland GmbH
Current assignee: Heruimai Co ltd
Priority date: 2014-01-29
Filing date: 2015-01-27
Publication date: 2020-04-07
Anticipated expiration: 2035-01-27
Also published as: KR20160114667A; DE102014101101A1; ES2792988T3; KR102315239B1; CN105980073A; US20180029093A1; EP3099433A1; US10987711B2; EP3099433B1; JP2017504484A; WO2015113971A1; JP6423888B2

Abstract

The invention relates to a roller straightener (1), the roller straightener (1) is used for straightening an elongated linear member, the roller straightener is provided with at least one first straightening roller (24,25), the at least one first straightening roller (24,25) is installed to rotate around a first rotating shaft (43) and is driven by a motor; and at least one second straightening roll (29), the at least one second straightening roll (29) being mounted to be rotatable about a second rotational axis (45) and being driven by a motor, wherein the first rotational axis (43) and the second rotational axis (44) are inclined with respect to the longitudinal axis of an elongated linear member to be received in the roll straightener (1), and wherein the first rotational axis (43) and the second rotational axis (44) are inclined with respect to each other. In order to provide a roller leveler which can be flexibly assembled for different required profiles, it is proposed according to the invention that: the first rotation axis (43) is mounted on a first holding device (17) and the second rotation axis (44) is mounted on a second holding device (17), and wherein the first holding device (17) and the second holding device (17) are removably supported by a frame (2), the frame (2) being adapted to receive a variable number of holding devices (17) with straightening rollers (24,25, 29).

Description

Roller leveler and method for producing elongated linear member

Technical Field

The invention relates to a roll straightener for straightening elongated linear members, having at least one first straightening roll which is mounted so as to be rotatable about a first axis of rotation and is driven by a motor, and at least one second straightening roll which is mounted so as to be rotatable about a second axis of rotation and is driven by a motor, wherein the first and second axes of rotation are inclined with respect to the longitudinal axis of the elongated linear member to be received in the roll straightener and the first and second axes of rotation are inclined with respect to one another.

The invention further relates to a method for producing an elongated wire-shaped component, comprising the steps of: providing an elongated linear member to be straightened and straightening the elongated linear member with a roll straightening machine comprising at least one first straightening roll mounted rotatable about a first rotation axis and driven by a motor, and at least one second straightening roll mounted rotatable about a second rotation axis and driven by a motor, wherein the first and second rotation axes are inclined with respect to the longitudinal axis of the elongated linear member to be received in the roll straightening machine and the first and second rotation axes are inclined with respect to each other.

Background

Elongated wire-shaped members made of steel, in particular tubes made of stainless steel, are generally subjected to a heat treatment, for example an annealing, after cold forming. In the process, deformations of the pipe piece in its straightness are produced.

However, modern use of stainless steel tubing has stringent requirements on the straightness of the tubing. It is therefore not uncommon for a pipe to have no deviation in straightness of more than 0.2mm over a reference length of one meter. When a one-meter long straight edge is placed against the outer surface of the pipe it must not be any more than 0.2mm away from the outer surface of the pipe.

To restore the required straightness of the pipe after heat treatment, a straightening machine is used to straighten the pipe. The most important combination of machines for straightening pipe is the so-called continuously running cross roll straightener. In the process, the tubular is run between and engaged with at least two rollers, wherein the axes of rotation of the at least two rollers are inclined with respect to the tubular and inclined with respect to each other.

However, depending on the pipe to be straightened, a different number of straightening rollers or a different number of pairs of straightening rollers is required.

Thus, up to now the manufacture of pipes has to be equipped with a plurality of roll levelers in order to be able to cover different applications for different pipes.

Disclosure of Invention

On the contrary, the problem of the invention is to provide a roll straightener which can be flexibly fitted for different desired profiles.

The above-mentioned problems are solved by a roller leveler for straightening an elongated linear member, the roll straightener has at least one first straightening roll, which is mounted so as to be rotatable about a first axis of rotation and is driven by a motor, and at least one second straightening roll, the at least one second straightening roller is mounted rotatable about a second axis of rotation and is driven by a motor, wherein the first and second axes of rotation are inclined with respect to the longitudinal axis of the elongated linear member to be received in the roll straightener and the first and second axes of rotation are inclined with respect to each other, wherein the first rotation axis is mounted on the first holding means, the second rotation axis is mounted on the second holding means, wherein the first and second holding means are removably supported by a frame adapted to receive a variable number of holding means with straightening rollers.

If the elongated linear member to be straightened is passed between the rolls in engagement with the straightening rolls of the roll straightener, with the rolls being rotated about their axes of rotation by the motor, the elongated linear member undergoes a bending deformation which on average causes the elongated linear member to leave the roll straightener in a straight state.

For this purpose, in an embodiment of the invention, the roller has an outer surface deviating from a cylindrical shape. It is advantageous if in an embodiment at least one of the rolls has a concavely curved outer surface, wherein in an embodiment the concavely curved portion has a hyperbolic profile in a radial cross-sectional plane.

In the sense of the present invention, the elongated linear member to be straightened by the roll straightener is a longitudinally extending body which preferably has a circular cross section, i.e. in particular a round rod or tube.

The inclination of the first and second rotation shafts with respect to each other and with respect to the longitudinal axis of the elongated linear member to be received in the roll straightener means that the rotation shafts form an angle such that they are not parallel to each other and that the rotation shafts form an angle with respect to the elongated linear member to be straightened such that the rotation shafts do not extend parallel to the longitudinal axis of the elongated linear member.

An important factor in the functioning of the roll straightener according to the invention is the at least two rolls, wherein the respective holding means of the at least two rolls are received in the frame of the machine in a removable manner. In this way, a simple and modular replacement of the straightening rollers is possible, so that the machine can be fitted for different demanding profiles.

In particular, it is known that different elongated linear members to be straightened require different numbers of straightening rollers. Therefore, an important feature of the roll leveler according to the present invention is: the frame is arranged such that a variable number of holding devices with rollers received thereon can be mounted to the frame. Thus, the same frame of the roll straightener can be provided with a completely different number of straightening rolls.

In order to ensure modularity and variability, in an embodiment the frame comprises at least one rail on which the holding device with the straightening rollers can be received.

In an embodiment, it is advantageous if the frame comprises at least one first rail and one second rail, wherein a first holding device with a straightening roller is received on the first rail and a second holding device with a straightening roller is received on the second rail.

In this way, a variable and adjustable number of straightening roll pairs can be mounted on the roll straightener.

In an embodiment of the invention, the first and second holding means each have a through hole through which the first and second rails of the frame extend.

A rail in the sense of the present invention is a longitudinally extending profile, in particular a profile with a circular cross-section, such as a round bar.

For example, in order to prevent the holding device from turning over on a bar-shaped profile with a circular cross section, it is advantageous in an embodiment of the invention if the roller straightener comprises a first pair of rails and a second pair of rails, wherein the first and second holding devices each comprise a pair of through holes, wherein the first pair of rails extends through the pair of through holes of the first holding device and the second pair of rails extends through the pair of through holes of the second holding device.

A preferred embodiment of the invention is here an embodiment in which the first pair of rails is arranged vertically below the second pair of rails on the frame, wherein the four rails extend parallel to each other. In this way, one of the pair of straightening rollers may be arranged on the top and the other on the bottom of the straightener in each case.

It has proved to be particularly advantageous if, in an embodiment, the roll straightener comprises three or more straightening rolls. Thus, in an embodiment, a plurality of holding devices with straightening rollers are received on each pair of rails, wherein preferably the number of rollers the holding device is received on each pair of rails is the same.

In an embodiment of the invention, the rail has a stop at the first end and a thread at the second end, wherein a nut is arranged on the thread, by means of which a plurality of retaining means are pressed in the direction of the stop.

Here, a stop is to be understood as meaning any element which is arranged and formed in such a way that: this element prevents the retaining device from sliding off the rail. By fastening the nut on the thread of the rail, the holding devices, and in particular the holding devices, can be clamped against each other and against the stop of the rail.

Here, the nut advantageously comprises a hydraulic nut by means of which the holding device or holding devices can be rigidly clamped on the rail.

In order to ensure the required stability of the roller module comprising the holding device, the rotation shaft and the straightening rollers, in an embodiment of the invention the holding device has a substantially cubic basic body which is slid onto the at least one rail by means of one or more through holes.

It has proved advantageous here for the modularity of the roll straightener according to the invention if in an embodiment of the invention all the holding devices have the same structure and design with the same dimensions, in particular the same longitudinal extension.

In an embodiment of the invention, the length of the rail between the thread and the stop is approximately exactly an integer multiple of the longitudinal extension of the individual retaining means. However, in an embodiment of the invention, it is preferred that the length of the rail between the thread and the stop is an integer multiple of the longitudinal extension of the individual holding device plus a residual length, wherein a spacer or a plurality of spacers is received on the rail, the entire longitudinal extension of which spacer is equal to the residual length.

For example, if the rail length is six times the longitudinal extension of the holding device, it is possible to slide six holding devices, in which the straightening rollers are attached, one after the other onto the rail. In this way, in this embodiment, a twelve-roll straightener can be realized at the maximum. The fact that the length of the track between the thread and the stop is approximately an integer multiple takes into account that, for example, washers or the like may be provided between the retaining means. Over the optionally present remaining length of the rail, a spacer or a plurality of spacers can be received, the longitudinal extension or the total longitudinal extension of which approximately corresponds to the remaining length.

However, this solution also allows: fewer holding devices on which the straightening rollers are mounted can be provided than the number corresponding to the integer obtained by dividing the length of the rail (minus the remaining length, if applicable) by the longitudinal extension of the holding device.

For example, in this case it is advantageous if, in addition to the holding device with the straightening rollers, at least one spacer is supported as a position holder on the rail, which spacer has the same longitudinal extension as the holding device, or if a plurality of spacers are supported as position holders on the rail, which spacers together have the same longitudinal extension as the one or more holding devices.

In this way, on a frame with a rail length designed for, for example, a twelve-roll straightener (i.e. six holding devices are supported on each rail or each pair of rails), a roll straightener can be realized with five or fewer pairs of holding devices with associated straightening rolls. Thus, for example, a ten-roll straightener can be realized on the same frame.

In an embodiment of the invention, on one holding device, but preferably on each holding device, there is provided a polishing device which is fitted to: the rolls mounted on the holding device may be polished during the operation of the leveler. In this way, any deformations and damages of the surface of the straightening roll can be removed by polishing during the operation of the roll straightener.

For this purpose, a particularly advantageous embodiment according to the invention is one in which the motor-driven polishing means are feedable towards the roller.

In addition, the above-mentioned problems can also be solved by a method for producing an elongated wire-shaped member, comprising the steps of: providing an elongated linear member to be straightened, straightening the elongated linear member using a roller straightener comprising: at least one first straightening roll mounted rotatable about a first axis of rotation and driven by a motor, and at least one second straightening roll mounted rotatable about a second axis of rotation and driven by a motor, wherein the first and second axes of rotation are inclined with respect to the longitudinal axis of the elongated linear member to be straightened and the first and second axes of rotation are inclined with respect to each other, and wherein furthermore, in the roll straightener for straightening, the first axis of rotation is mounted on a first holding device and the second axis of rotation is mounted on a second holding device, the first and second holding devices being removably supported by a frame adapted to receive a variable number of holding devices with straightening rolls.

In an embodiment of the method according to the invention, the stainless steel tubing is straightened as an elongated wire-shaped member.

In a further embodiment of the invention, the stainless steel pipe fitting is cold formed from a hollow blank to form the pipe fitting, in particular by pilger cold rolling or by cold drawing, prior to straightening.

In an embodiment, the pipe is annealed in an annealing furnace between cold forming and straightening.

Aspects of the invention have been described above in relation to a roll straightener, which also apply to the corresponding method for producing an elongated wire-shaped member and vice versa. In terms of the method for production, this is achieved by the roller straightener according to the invention, the roller straightener or the production plant as a whole comprising suitable devices for this purpose. In particular, an embodiment of the roll straightener or the production facility is suitable for carrying out the described embodiment of the method and comprises in this embodiment the devices required for this purpose.

Drawings

Further advantages, features and applications of the invention will become clear on the basis of the description of the invention in the embodiments and the corresponding figures.

FIG. 1 shows a perspective view of a roll straightener according to an embodiment of the invention from above at an angle.

FIG. 2 shows a partially cut away schematic side view of the roll leveler of FIG. 1.

FIG. 3 shows a schematic side view of the polishing apparatus of the roll leveler in FIGS. 1 and 2.

In the drawings, like elements are labeled with like reference numerals.

Detailed Description

Fig. 1 shows a perspective depiction of a cross roll straightener 1 according to the invention from above at an angle. In this depiction it can be seen that the machine 1 has a frame 2 as a central element, the frame 2 serving as a load bearing supporting the basic functional units of the straightener 1. The frame 2 comprises first of all two vertical carrier plates 3, 4, which carrier plates 3, 4 are held together by means of two upper longitudinal carriers 5, 6 and two lower longitudinal carriers 7, 8 (in fig. 1, only the first longitudinal carrier 7 is depicted). The carrying floors 3, 4 and the longitudinal carriers 5, 6, 7, 8 together form a self-supporting structure to which further units and elements of the roller leveler 1 are fastened or suspended.

As can be seen from the depiction in fig. 1, in addition to the longitudinal supports 5, 6, 7, 8, the roller straightener 1 comprises a rail which is formed as a rod with a circular cross section, the

hydraulic nuts

9,10,11,12 of which protrude from the carrier plate 3.

The rails of the frame 2 form the central element in the construction of the roll straightener according to the invention. For a more detailed description of the roll straightener, we will now turn to the depiction of figure 2.

On the left side of fig. 2, two

hydraulic nuts

10, 12 of the four hydraulic nuts and their respective associated rails 13,15 in their extension in the longitudinal direction can be clearly seen. The tracks form pairs of an upper pair of tracks 13 and a lower pair of tracks 15. The rails 13,15 are parallel to each other and are arranged vertically one above the other.

The upper and lower rolls of the roll leveler 1 are received on the rails 13,15 and supported by the rails 13,15 by corresponding holding devices 17. In the depicted embodiment, the straightener 1 comprises five pairs of

upper rolls

24,25 and lower rolls 29. For simplicity, only two upper and

lower rollers

24,25,29 of these total ten rollers are depicted in fig. 2. Each roller of a pair of rollers is suspended by a retaining device 17 on the pair of rails. Here, all

upper rollers

24,25 are suspended on the upper rail 13, while the lower roller 29 is suspended on the lower rail 15.

A pipe to be straightened (not shown in the figures), which in the sense of the invention is an elongated wire-shaped member, extends through the machine 1 from the inlet 34 to the outlet in the longitudinal direction during operation of the machine. To form the cross roll straightener 1, the axes of rotation of all the rolls are oriented at an angle relative to the pipe to be straightened in the straightener, i.e. they are inclined relative to the pipe to be straightened. In fig. 2, the rotation axis of the first upper straightening roller 24 and the rotation axis of the first lower straightening roller 29 are drawn as an example and provided with reference numerals 43, 44. In addition, the axes of rotation 43, 44 of the two rollers of the pair of upper and lower rollers are arranged at an angle with respect to one another, in each case, namely: are also inclined with respect to each other.

The profile of the outer surface of each individual roll 24 to 33 is hyperbolic in a cross-sectional plane along the radius of the roll. Each roller has its own drive motor 45 so that when the roller engages the product to be straightened (i.e. the steel pipe to be straightened), the roller transports the pipe from the inlet 34 to the outlet.

Each holding device 17 has two through-holes with the same center-to-center distance as the rails 13 and 15, so that the holding device 17 in each case can be slid onto a pair of rails 13, 15.

Obviously, the rollers can be simply replaced by sliding the retaining means 17 onto the rails 13,15 or pulling away from the rails 13,15, or a differently configured roller arrangement can be provided. In particular, it is possible to realize a ten-roll straightener with five pairs of upper and lower rolls (the configuration is shown in the figures) and to convert the machine into an eight-roll straightener by removing the upper and lower pairs of rolls and their holding devices 17.

In order to make possible the modularity of the machine 1, all the holding devices 17 are identically constructed. In particular, these retaining means 17 have their cubic basic shape of the same size.

In the embodiment shown, the longitudinal extension of each rail 13,15 between the

hydraulic nut

9,10,11,12 and the stop 4 is an integer multiple (i.e. five times) of the longitudinal extension of each retaining device 17 plus a residual length. In the implementation of a ten-roll straightener, the amount of space remaining in front of and behind each pair of rails 13 and 15 (i.e. the remaining length) is filled by spacers 23, which spacers 23 have the same structure as the holding device 17, but wherein no rolls are received on these spacers 23. At the same time, the spacer 23 received on the rail has a longitudinal extension substantially equal to the remaining length.

If a straightener 1 with a smaller number of rolls is to be realized, on each pair of rails one or more holding devices are replaced by a position holder having the same longitudinal extension as the single holding device.

In order to obtain the desired stability, the conical ring of each holding device engages in a recess of the respective adjacent holding device 17 complementary to the conical ring, which concentrically surrounds the rails 13 and 15.

In addition, by pressing the

hydraulic nuts

9,10,11,12 of the respective first holding means or spacer element, the holding means are clamped against a stop of the rails 13,15, which stop is formed by the carrier plate 4 located behind when viewed in the longitudinal direction.

In addition, in the schematic side view of fig. 3, it can be seen that each roller has its own polishing device 40 (not depicted in fig. 1 and 2), the polishing device 40 enabling the polishing pad 41 to be fed in a radial direction towards the roller surface 42, so that the polishing pad 41 engages the roller surface 42 and polishes the roller surface as the roller 24 rotates.

For the purposes of this original disclosure, it should be noted that all features which are obvious to a person skilled in the art from the present description, drawings and claims, even if they are described in a specific form only in combination with certain additional technical features, can be combined not only individually but also in any desired combination with other features or groups of features disclosed herein, as long as such a combination is not made impossible or meaningless without explicit exclusion or technical context. A full and clear description of all possible combinations of features not described herein is provided for brevity and readability of the specification only.

Although the application has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are provided by way of example only and are not to be considered as limiting the scope of protection defined by the claims. The present application is not limited to the disclosed embodiments.

Variations to the disclosed embodiments will become apparent to those skilled in the art from the drawings, the specification, and the appended claims. In the claims, the term "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain features are claimed in different claims does not exclude a combination of them. Reference signs in the claims shall not be construed as limiting the scope.

List of reference numerals

1 cross roll straightener

2 frame

3, 4 carrying plate

5, 6 upper longitudinal support

7, 8 lower longitudinal support

9,10,11,12 hydraulic nut

13 upper track

15 lower track

17 holding device

23 spacer

24,25 top roll

29 lower roller

34 inlet

40 polishing device

41 polishing pad

42 roll surface

43, 44 rotating shaft

45 driving motor

Claims

1. A roll leveler (1) for straightening an elongated linear member, the roll leveler (1) comprising:

at least one first straightening roller (24,25), the at least one first straightening roller (24,25) being mounted so as to be rotatable about a first axis of rotation (43) and being driven by a motor, and

at least one second straightening roller (29), the at least one second straightening roller (29) being mounted so as to be rotatable about a second axis of rotation (44) and being driven by a motor,

wherein the first rotation shaft (43) and the second rotation shaft (44) are inclined with respect to the longitudinal axis of an elongated linear member to be received in the roll straightener (1) and,

wherein the first rotation axis (43) and the second rotation axis (44) are inclined with respect to each other,

wherein the first rotation axis (43) is mounted on a first holding device (17),

wherein the second rotation axis (44) is mounted on a second holding device (17),

wherein the first and second holding means (17, 17) are removably supported by a frame (2), the frame (2) being adapted to receive a variable number of holding means (17) with straightening rollers (24,25,29),

characterized in that the frame (2) comprises at least a first rail (13,15) and a second rail (13,15), wherein the first retaining means (17) is received on the first rail (13), the second retaining means (17) is received on the second rail (13,15), and the first retaining means (17) and the second retaining means (17) each have a through hole through which the rails (13,15) extend,

and all the retaining devices (17) have the same structure.

2. Roll straightening machine (1) according to claim 1, characterized in that the frame (2) comprises a first pair of rails (13) and a second pair of rails (15), wherein the first holding device (17) and the second holding device (17) each comprise a pair of through holes, wherein the first pair of rails (13) extends through the pair of through holes of the first holding device (17) and the second pair of rails (15) extends through the pair of through holes of the second holding device (17).

3. Roll straightener according to claim 2, characterized in that on each pair of rails (13,15) a number of holding devices (17) with straightening rolls (24,25,29) are received.

4. Roll straightening machine (1) according to claim 1, characterized in that the rails (13,15) comprise a stop (4) on a first end and a thread on a second end, wherein a nut (9,10,11,12) is arranged on the thread, by means of which nut the holding device (17) is pressed towards the stop.

5. Roll straightening machine (1) according to claim 4, characterized in that the nuts comprise hydraulic nuts (9,10,11, 12).

6. Roll straightener (1) according to claim 1, characterized in that the holding device (17) comprises a cubic body which is pushed onto at least one of the rails (13,15) through a through hole.

7. Roll straightening machine (1) according to claim 4, characterized in that the length of the rails (13,15) between the thread and the stop (4) is an integer multiple of the longitudinal extension of the holding device (17) plus a residual length, wherein one or more spacers (23) are received on the rails (13,15), wherein the one or more spacers have a longitudinal extension equal to the residual length.

8. Roll straightener (1) according to claim 7, characterized in that a position holder with the same longitudinal extension as the holding device (17) or a plurality of position holders together with the same longitudinal extension as the holding device (17) is received on a rail (13,15) if the holding device (17) received on the rail (13,15) is less than the whole integer number which is the result of the length of the rail (13,15) minus the remaining length divided by the longitudinal extension of the single holding device (17).

9. Roll straightening machine (1) according to claim 1, characterized in that a polishing device (40) is provided on the holding device (17), which polishing device is arranged such that the first straightening roll (24,25) and the second straightening roll (29) mounted on the holding device (17) can be polished during operation of the roll straightening machine (1).

10. Roll straightener (1) according to claim 9, characterized in that the polishing device (40) comprises a motor-driven polishing head (41), which motor-driven polishing head (41) can be fed towards and against the first (24,25) and second (29) straightening rollers.

11. Roll straightener (1) according to any one of the claims 1-7, characterized in that all the holding devices (17) have the same longitudinal extension.

12. Roll straightener (1) according to claim 3, characterized in that the number of the holding devices (17) with straightening rolls (24,25,29) received on each pair of rails (13,15) is the same.

13. Roll straightener (1) according to claim 3, characterized in that the number of straightening rolls (24,25,29) received on each pair of rails (13,15) is the same.

14. A method of producing an elongated wire-shaped member, the method comprising the steps of:

providing an elongated linear member to be straightened, and

straightening the elongated linear member with a roller straightener, the roller straightener comprising:

at least one first straightening roller (24,25), which at least one first straightening roller (24,25) is mounted so as to be rotatable about a first axis of rotation (43) and is driven by a motor,

wherein the first rotation axis (43) and the second rotation axis (44) are inclined with respect to the longitudinal axis of the elongated linear member to be straightened, and,

wherein, in the roll leveler for straightening, further,

the first rotation shaft (43) is mounted on a first holding device (17),

the second rotation shaft (44) is mounted on a second holding device (17), and

the first and second holding devices (17, 17) being removably supported by a frame (2), the frame (2) being adapted to receive a variable number of holding devices (17) with straightening rollers (24,25,29),

and all the retaining devices (17) have the same structure.